<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>

  <script>
    var arr = [{ label: '男', value: 1 }, { label: '女', value: 0 }]

    function f(arr) {
      // 写代码，得到
      const res = arr.map(item => {
        return item.label
      })
      return res
    }
    var obj = f(arr);
    console.log(obj)
 // arr2 = ['男', '女']
  </script>
</body>

</html>